Hi Thomas
I do have an idea what might be happening here. You are using 6.13.1,
right? If I give you a patch file for this kernel, are you able to
apply it (with 'git am') for testing and report the kernel's logging
output?
Yes I'm using Linux 6.13.1 but I can also test with the latest
linux-stable 6.13.5 or on mainline, whatever help you the best.
The only thing is I cannot go before Linux 6.13+ because it it fix DIO
write on netfs (regression introduced in 6.10) and I'm using this
feature for backups.
I think I should be able to patch and use 'git am' (In the worst there's
always https://git-scm.com/docs/git-am), and I would be happy to report
the kernel logging output
Thanks again for help
Kind regards
Nicolas Baranger
Le 2025-03-03 09:19, Thomas Zimmermann a écrit :
Hi
Am 03.03.25 um 09:07 schrieb Nicolas Baranger: Dear Thomas
You are using NVidia's proprietary driver, right? Did you reach out to
them wrt this problem? Or searched their support forums, online help,
etc? If so, what are the results?
Yes I'm using NVidia propriétary driver.
Maybe I'm wrong but I did not ask their support directly because first,
for me it seems that there is no issue with the NVidia driver and
unfortunately NVidia is not as opensource mind as Linux kernel
community (as an example you can have a look on my last PR here
https://github.com/NVIDIA/open-gpu-kernel-modules/pull/783 which had
not been reviewed since 3+ weeks... and without this PR, it's
impossible to build open or closed source NVidia drivers on mainline)
I see.
I do have an idea what might be happening here. You are using 6.13.1,
right? If I give you a patch file for this kernel, are you able to
apply it (with 'git am') for testing and report the kernel's logging
output?
Best regards
Thomas
Second, I thought I already report it here but on my system using a
recent kernel and embeded ast 0.1.0 driver has a very poor rendering
and graphic is very slow, twinkle is high, had poor colors and it's
happenning even if the NVidia driver is unloaded
The screen flickering is high too and it's like if I was using an old
cathode ray tube monitor (I'm using an LCD monitor which display a nice
and eyes confortable picture when using ast 1.15.1 driver or when
displaying directly the video output of the Nvidia GPU(using HDMI
output)).
Third, approximately from Linux 6.10+ using the embeded ast driver I
have some lag when sliding a window on Gnome desktop (Xorg not Wayland)
and CPU is highly used (some coreS at 100%), but I do not have those
lag with ast 1.15.1 and CPU is less used (1 core at less than 80% max)
For the moment, I think Linux 6.12.9 is the worst I constat
Last, I found that Linux 6.1.128 is working perfectly out of the box
with embeded ast 0.1.0 driver and there is a manifest lost of
performances with Vulkan and Nvidia prime render offload when upgrading
to Linux 6.2 (using same NVidia driver version, I did test those 3
versions 535.216.01, 550.142, and 550.144.03 with similar results).
But in Linux 6.2, except the lost of performances, I did not constat
the poor rendering and twinkle on the screen nor lag when sliding a
window on the desktop or too high CPU usage.
So I suspect there is something else introduced between Linux 6.2 and
mainline which cause this behavior.
I'm continuing bissection and I'm sorry, it's not as fast as I would as
each tests tooks some times and I must never tell something wrong to
git if I don't want to restart all the work...
Thanks again for answer and help
Kind regards
Nicolas Baranger
Le 2025-02-28 11:06, Thomas Zimmermann a écrit :
Hi
Am 11.02.25 um 19:15 schrieb Nicolas Baranger:
Dear maintener
For my own usage, I did make work the ASPEED ast-drm 1.15.1 video
driver on mainline kernel (6.13.0 + 6.13.1).
ASPEED video driver is availiable here:
https://www.aspeedtech.com/file/support/Linux_DRM_1.15.1_4.tar.gz
But it only work for LTS kernel
So I modify the DKMS package and I build a new Debian DKMS package with
the adapted source.
My patch can be find here :
https://xba.soartist.net/ast-drm_nba_20250211/nba-dkms/astdiff.patch
See the README:
https://xba.soartist.net/ast-drm_nba_20250211/nba-dkms/README
Using this new 'ast 1.15.1' driver, performance are amazing compared to
the 'ast' driver include in kernel tree, specially when using a
discrete GPU and offloading VULKAN / 3D on it but using AST VGA card as
the main video card and as the main and only video output (the discrete
GPU is used only for offloading 3D or for cuda/opencl)
You are using NVidia's proprietary driver, right? Did you reach out to
them wrt this problem? Or searched their support forums, online help,
etc? If so, what are the results?
Best regards
Thomas
So to make things easier, I include the new 'ast 1.15.1' driver in
kernel tree as AST_NEW : linux-6.13.1-ast/drivers/gpu/drm/ast_new'
It's working fine as you can see on this video :
https://xba.soartist.net/ast-drm_nba_20250211/vulcan_nvidia_prime_render_offload_on_ast_vga_card.webm
I upload all the work I've done here :
https://xba.soartist.net/ast-drm_nba_20250211/
See the global README :
https://xba.soartist.net/ast-drm_nba_20250211/README
and the README in nba-kernel sub-directory :
https://xba.soartist.net/ast-drm_nba_20250211/nba-kernel/README
I'm not a developer so please let me know if I made the things the
right way and if this new 'ast 1.15.1' driver can be ported to
linux-next or linux-? ?
If you need more explanations, do not hesitate to contact me, I would
be happy to help
Kind regards
Nicolas Baranger
